MCP server

402shield

io.github.MitchSingh/402shield

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

x402 payment security and pre-execution transaction risk screening for autonomous AI agents.

Working at last checkAbout 371 tokens per request once connected1 tools

https://four02shield.onrender.com/mcp

At a glance

Type: MCP server
Publisher: Not verified
Status: Working at last check
Tools: 1
Token cost: About 371 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 UTC

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http 402shield https://four02shield.onrender.com/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.402shield]
url = "https://four02shield.onrender.com/mcp"

Gemini CLI

{"mcpServers":{"402shield":{"httpUrl":"https://four02shield.onrender.com/mcp"}}}

Cursor

{"mcpServers":{"402shield":{"url":"https://four02shield.onrender.com/mcp"}}}

VS Code

{"servers":{"402shield":{"type":"http","url":"https://four02shield.onrender.com/mcp"}}}

Antigravity

agy mcp add 402shield https://four02shield.onrender.com/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"402shield","server_url":"https://four02shield.onrender.com/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"402shield","server_url":"https://four02shield.onrender.com/mcp"}

preflight_payment ~371 tokens
Prepare the exact paid 402Shield request that must be completed before an autonomous payment executes. Submit the returned POST request with an x402-capable client. The paid response is ALLOW, REVIEW, or BLOCK. Execute the intended payment only after ALLOW; REVIEW and BLOCK should stop execution by

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